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4 cards from this section. Quick, good the night before a test.
Define DMA.
Think about how devices transfer data without needing the CPU.
What happens in burst transfer mode?
Consider how that impacts CPU waiting time.
What is one of the primary benefits of using DMA over traditional interrupt-driven methods?
Think about whether the CPU needs to manage tasks during the data transfers.
True or False: In DMA cycle stealing mode, the CPU can work during data transfers.
Consider the operating model of both DMA modes.
You need to transfer a 10 MB file using DMA configured with a 32-bit data bus. If the bus can handle 256 KB per burst transfer, calculate how many total transfers are necessary and how long the CPU might get interrupted.
Break down the total size into manageable blocks based on the bus capabilities.
Consider a scenario in which the DMA controller must interface with both high-speed and low-speed devices. How technology might ensure optimal transfer efficiency? Discuss solution approach.
Think about how the controller can manage demands from both types of devices to boost efficiency.
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